Find all real numbers that satisfy the equation.2 cos x - 1 = 0
A. x = 
+ n? or x = 
+ n?
B. x = 
+ n? or x = 
+ n?
C. x = 
+ 2n? or x = 
+ 2n?
D. x = 
+ 2n? or x = 
+ 2n?
Answer: D
Mathematics
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A. No solution B. [6, -6] C. 6 D. [-6, 6]
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Find an equation of an ellipse satisfying the given conditions.Foci at (-2, 0), (2, 0); vertices at (-4, 0), (4, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
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Solve the problem.From a group of 3 men and 4 women, a delegation of 2 is selected. What is the expected number of men in the delegation?
A. .57 B. .48 C. 1 D. .86
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Write the partial fraction decomposition of the rational expression.
?
?
A. 
B. 
C. 
D. 
E. 
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